Six days ago, IBM agreed to buy a quantum-computing lab that builds a kind of qubit IBM does not. This week, the lab showed the world why. HRL Laboratories published a result in Nature on Wednesday: a silicon quantum processor that, in effect, runs itself. The Malibu research house is jointly owned by Boeing and General Motors. IBM had agreed to acquire it on 23 July, before the paper was public. The wiring problem Every quantum computer hits the same scaling trap. The qubits sit in a refrigerator near absolute zero. The electronics that control them sit at room temperature, in racks. Each qubit needs its own control lines running down into the cold. Scale to the millions of qubits a useful machine will need, and the wiring becomes an impossible tangle. HRL moved the controller into the cold. It built a custom chip that runs at about 4 kelvin, inside the fridge beside the qubits. That chip generated every control signal for an 18-qubit device. Crucially, it ran error correction on its own, with no real-time help from room-temperature electronics, the company said. HRL says that is a first. How they kept the qubits cold Putting warm electronics next to cold qubits sounds self-defeating. Even at 4 kelvin, the controller is hot compared with the qubits below it. The fix is a new superconducting ribbon cable. It carries hundreds of control signals down to the qubits, but almost none of the heat. The fragile quantum states survive. The numbers back the claim. HRL reports control errors ten times lower than any previous demonstration with this type of qubit. Each operation takes under a microsecond. When the team added more qubits to its error-correcting code, the error rate fell about fivefold. That is the “error suppression” every quantum computer will